Azarenka, who will lose her top ranking to Serena Williams on Monday, has now won 12 of her last 15 meetings with Radwanska and hasn't lost to the fourth-ranked Pole in almost two years.

Both players struggled to hold serve in the early stages, but Azarenka took control after breaking for 3-2 in the first set. She ran off eight of nine games, taking a 3-0 lead in the second that held up. In the second semifinal, Williams faced Maria Sharapova.